refactor(workflow): simplify edge configuration

frontend/src/components/assistant-editor/editor-controls.tsx

@@ -93,12 +93,16 @@ export function EditableTitle({
   placeholder = "未命名助手",
   editLabel = "助手名称",
   variant = "page",
+  allowEmpty = false,
+  maxLength,
 }: {
   value: string;
   onChange: (value: string) => void;
   placeholder?: string;
   editLabel?: string;
   variant?: "page" | "panel";
+  allowEmpty?: boolean;
+  maxLength?: number;
 }) {
   const [editing, setEditing] = useState(false);
   const [draft, setDraft] = useState(value);
@@ -118,7 +122,7 @@ export function EditableTitle({
 
   function commit() {
     const next = draft.trim();
-    if (next) {
+    if (next || allowEmpty) {
       onChange(next);
     }
     setEditing(false);
@@ -129,6 +133,7 @@ export function EditableTitle({
       <input
         ref={inputRef}
         value={draft}
+        maxLength={maxLength}
         onChange={(event) => setDraft(event.target.value)}
         onBlur={commit}
         onKeyDown={(event) => {